Freely movable gas-air torch



D. S. PEARL FREELY MOVABLE GAS-AIR TORCH Nov. 3, 1970' 2 Sheets-Sheet 1 Filed Oct. 16, 1968 INVENTOR David ATTORNEY Nov. 3, 1970 0. s. PEARL 3,537,652

FREELY MOVABLE GAS-AIR TORCH v Filed oct. 16; 1968 2 Sheets-Sheet 2 ATTORNEY United States Patent O 3,537,652 FREELY MOVABLE GAS-AIR TORCH David S. Pearl, Fort Lauderdale, Fla., assignor to Uniweld Products, Iuc., Fort Lauderdale, Fla., a corporation of Delaware Filed Oct. 16, 1968, Ser. No. 768,029 Int. Cl. B05b 7/02 U.S. Cl. 239-525 2 Claims ABSTRACT OF THE DISCLOSURE A gas-air blowpipe, or torch, freely movable in use without any coiling of the gas supply hose, comprising, in combination, a blowpipe, or torch, handle including gas inlet swivel coupling connection means, a blowpipe, or torch, head and a replacement blowpipe, or torch tip, whereby the blowpipe can be freely moved without any twisting and turning to keep the gas supply hose connected thereto in uncoiled condition.

BACKGROUND OF THE INVENTION Field of the invention This invention relates to gas-air blowpipes or torches such as are ordinarily used for soldering, heating, brazing, bending, straightening dents in metallic or plastic, for example thermoplastic, materials, and thawing frozen pipes. Such torches or blowpipes are used by plumbers, automobile body mechanics, air conditioning and refrigeration mechanics, sheet metal mechanics and similar artisans. Such blowpipes or torches are usually referred to as hand blowpipes or torches and utilize a fuel gas such as acetylene which is mixed in the handle with the air surrounding the handle by aspiration. More particularly, this invention relates to such an improved gas-air blowpipe which can be freely moved during use without the necessity for twisting and turning it in order to keep the gas supply hose connected to it uncoiled. Such improved gasair blowpipe of this invention comprises the handle including a gas inlet swivel coupling connection means as a component portion thereof, the blowpipe head and the replacement blowpipe tip positioned in said head.

Description of the prior art Hand gas-air blowpipes, or torches, as presently known, are disclosed in such U.S. patents as the Young U .8. Pat. No. 2,248,731, the Kennepohl U.S. Pat. No. 2,833,272, and the Lynes Pat. No. 2,720,257. Also, disclosed by the prior art is a gas supply hose connection means as shown in the Cave U.S. Pat. No. 1,235,876. In addition, the use of swivel couplings in combination with connecting nipples for connecting two separate lengths of gas hose is shown in the Bynoe U.S. Pat. No. 2,394,363. Swivel couplings per se are generally known and have been disclosed in the Waters U.S. Pat. No. 738,503, the Blanchard U.S. Pat. No. 1,771,949 and the Allen et a1. U.S. Pat. No. 3,384,360.

In the prior art hand gas-air blowpipes or torches free movement of the blowpipe without coiling of the gas supply hose attached to the blowpipe is not capable of accomplishment during use. It has been necessary to twist and turn such prior art blowpipes during use to keep the gas supply hose uncoiled.

SUMMARY OF THE INVENTION The freely movable hand gas-air blowpipes of this invention include any of or all of the conventional or known component elements, such as a portion of the handle, the head and the replacement tip, and a freely movable hand gas-air blowpipe of this invention includes,

ice

as a component part of the blowpipe handle, the blowpipe handle gas inlet swivel coupling connection means for preventing coiling of the gas supply hose connected thereto while said blowpipe is being used, whereby the blowpipe is freely moved and said gas supply hose is simultaneously kept uncoiled without the need for any twisting and turning of the blowpipe during use.

One of the objects of this invention is to provide a freely movable hand gas-air blowpipe having a handle with handle gas inlet swivel coupling connection means as a component part thereof for preventing coiling of the gas supply hose during use.

Other objects and features will be readily apparent from the following detailed description which is not limiting but only illustrative of the preferred embodiment of this invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of the hand gas-air blowpipe of this invention connected to a gas supply hose.

FIG. 2 is an enlarged cross-sectional view taken on line 22 of FIG. 1 showing a component portion of the hand gas-air blowpipe handle.

FIG. 3 is an exploded view in perspective of the component portion of the handle shown in FIG. 2.

DESCRIPTION OF THE PREFERRED EMBODIMENT Elements or groups of elements which are conventional and generally widely known in the field to which the hand gas-air blowpipe, or torch, of this invention relates of course form a part of the blowpipe of this invention herein described, and their exact nature or type is not here described in detail for the reason that a person skilled in the art can understand and use the hand gas-air blowpipe of this invention without a detailed recitation of such conventional and generally widely known elements or groups of elements.

More particularly, the hand gas-air blowpipe 2 of this invention includes handle 4 including, as a component part thereof, handle gas inlet swivel coupling connection means 6 for preventing coiling of the gas supply hose '8 during use of blowpipe 2. Hand gas-air blowpipe 2 also includes blowpipe head 3 and replacement blowpipe tip or stem 5 securely positioned in said head 3. Gas supply hose 8 includes coupling member or fitting 7 fixedly and securely attached to the handle gas inlet swivel coupling connection means 6. Nipple 9 is securely and fixedly positioned in hose 8, as is clearly shown in the appended drawings.

Handle 4 includes pilot control valve assembly 11 for regulating the flow of the fuel gas and sleeve 13 of a material such as a suitable thermosetting plastic resin for affording a handle portion for the manipulation of the blowpipe. Sleeve 13 can be a suitable metallic material as Well as a suitable non-metallic material such as a thermosetting resin. Handle 4 also includes threaded portion 15 and handle gas inlet swivel coupling connection means 6. Gas inlet swivel coupling connection means 6 includes conduit 12 having collar 17 thereon and therearound and passageway 49 therethrough. Positioned about conduit 12 and in engagement with collar 17 is screw coupling 10 fixedly and securely threadedly engaged on and with threaded portion 15. Conduit 12 has in its surface peripherally spaced-apart grooves 19, 21 and 23, and positioned in said grooves are spring clip or locking split snap washer 16, O-ring 18 and O-ring 18, respectively, in positive sealing contact with the combination of coupling member 29' and gland nut 14, as clearly apparent from -and shown in the appended drawings. Wash er 16, as is clearly apparent from and shown in the appended drawings, serves both as a sealing means and a means for holding the coupling member 20-gland nut 14 combination against transverse movement along conduit 12 while allowing said combination to rotate on and about conduit 12. O-rings 18, 18 and washer 16 seal said rotatably mounted combination and conduit against gas flow therebetween. Coupling member 20 has inwardly flared opening 25 for receiving and seating mpple 9 of hose 8, and threaded portion 22 of coupling member 20 receives in threaded engagement therewith fitting 7. Fitting 7 is, of course, rotatably mounted on and about nipple 9 prior to being fixedly secured on and about threaded portion 22 and is held in its fixedly secured position on and about nipple 9 against peripheral collar 27, as is clearly apparent from and shown in the appended drawings. Of course there is a metal-to-metal tight seating of nipple 9 in opening 25 and against the walls of said opening 25, as is clearly apparent from and shown in the appended drawings. Likewise the end 47 of conduit 12 is in metal-to-metal seating relationship with the inwardly flared opening 29 of the outer surface threaded portion 15.

In assembling said handle 4 with its gas inlet swivel coupling connection means 6, conduit 12, apart from the remainder of the handle, is so manipulated that screw coupling 10 is first positioned thereon and thereabout up against collar 17. Then, gland nut 14 is slipped onto conduit 12 up against screw coupling 10, as clearly shown by the dotted lines in FIG. 2. Locking snap washer 16 and O-rings 18, 18 are then positioned in their grooves 19, 21 and 23, respectively. Coupling member 20 having the outer threaded flange or nipple 22 and oppositely positioned outer threaded portion 24 is then slipped or positioned onto condiut 12, and said outer threaded portion 24 is then threadedly engaged with internally threaded portion 69 of gland nut 14 after movement of gland nut 14 and coupling member 20 toward each other to the position, as clearly apparent from and shown in the appended drawings, particaularly FIG. 2 thereof. Flange 31 of gland nut 14 abuts washer 16 as does the internal or inner surface of gland nut 14. Flange 31 of gland nut 14 and the end portion of coupling member 20 form, in assembly, a groove defined thereby for receiving washer 16, and said coupling member end portion likewise abuts washer 16. In using the freely movable hand gas-air torch of this invention and herein completely and fully described the coupling screw 20-gland nut 14 combination having the gas supply hose 8, its coupling member of fitting 7, and its nipple 9, all securely and fixedly attached thereto, will be caused to rotate on and about conduit 12 by the hose 8 during free movement of the blowpipe in use, thereby preventing coiling of hose 8. Thusly is the necessity for turning and twisting of blowpipe 2 obviating during use to keep hose 8 uncoiled. Also, coupling member 10 and conduit 12 will rotate with respect to the coupling member 20-gland nut 14 combination. At all times, no fuel gas leakage takes place during use of the hand gas-air blowpipe 2 described herein.

Many alterations and changes may be made without departing from the spirit and scope of this invention which is set forth in the appended claims which are to be construed as broadly as possible in view of the prior art.

I claim:

1. A freely movable hand blowpipe comprising, in

combination,

(A) a freely movable blowpipe handle, for connection to a gas supply hose, including freely movable gas inlet swivel coupling connection means for attachment to said gas supply hose for preventing coiling of said gas supply hose while using said blowpipe, said gas inlet connection means including (1) a conduit member for operative association with said gas supply hose, (2) a coupling member-gland nut combination rotatably mounted on and about said conduit member without any substantial movement transverse to the direction of its rotation on and about said conduit member, and (3) means for sealing said rotatably mounted combination and said conduit member against any substantial gas flow therebetween said sealing means including a spring Washer means for holding said coupling membergland nut combination against any substantial movement transverse to the direction of its rotation on or about said conduit member and at least one O-ring member, said rotatably mounted coupling member-gland nut combination including means for coupling said gas supply hose thereto, (B) a blowpipe head, and (C) a replacement blowpipe tip, said head and tip being freely movable with said handle, whereby said gas supply hose causes the rotatably mounted coupling member-gland nut combination to rotate on and about the conduit member during movement of the blowpipe thereby preventing coiling thereof and whereby the blowpipe is freely moved and said gas hose is simultaneously kept in uncoiled condition without the need for any twisting and turning of the blowpipe during Its use to keep the gas supply hose in uncoiled condition. 2. The blowpipe of claim 1 wherein said sealing means includes, in addition another O-ring member and said conduit member has three spaced-apart grooves in its outer surface, each of said washer and said two O-ring members being fixedly positioned in each of said grooves, respec tively, and being in positive contact with the inner surfaces of said combination.

References Cited UNITED STATES PATENTS 3,011,803 12/1961 Buckner et al. 285-98 X 3,089,713 5/1963 Scaramucci 28598 X 3,279,701 10/1966 Falk et al. 239586 X LLOYD L. KING, Primary Examiner US. Cl. X.R. 

